Water-based paint waste gas biological purification treatment tower for container spraying

Abstract

The utility model relates to the technical field of biological purification treatment towers, and discloses a water-based paint waste gas biological purification treatment tower for container spraying, which comprises a biological tower, an atomizing tower is arranged on the left side of the biological tower, and a gas delivery pipe is arranged between the biological tower and the atomizing tower; the air inlet is formed in the left side of the atomization tower, and an exhaust port is formed in the upper surface of the biological tower; the biological filler layer is arranged at the lower part of the inner cavity of the biological tower; the additionally arranged water spraying pipe sprays microorganisms in the biological water tank to the surface of the honeycomb activated carbon, after the microorganisms are attached to the surface of the honeycomb activated carbon, the VOCs removal performance is improved through the dual effects of adsorption and biodegradation, and when waste gas composed of ethyl alcohol, ketone, esters and aromatic compounds is treated, the VOCs removal efficiency is improved. The waste gas removal efficiency of the microorganism-loaded activated carbon is much higher than that of microorganism-free-loaded activated carbon, so that the water-based paint waste gas cleaning efficiency of the honeycomb activated carbon can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biological purification treatment towers, in particular to a biological purification treatment tower for waste gas from container spraying of water-based paint. Background Art

[0002] A biological purification treatment tower, also known as a biological purification tower or a biological waste gas purification tower, is a purification equipment that uses microorganisms to biodegrade waste gas or wastewater.

[0003] The main waste gas from water-based paint used for container spraying is volatile organic compounds (VOCs). There are many types of VOCs. Some relatively active organic compounds can react with nitrogen oxides to form photochemical smog under certain meteorological conditions, which seriously threatens the ecological environment and is carcinogenic, teratogenic, and mutagenic to the human body. It has become the third largest air pollutant after particulate matter, NOX, and SO2, and is one of the important factors that endanger human health and restrict social development and progress. Non-methane total hydrocarbons refer to all hydrocarbons (hydrocarbons) except methane. Because it is different from methane, it has greater photochemical activity and is a precursor to the formation of photochemical smog. When the NMHC concentration in the atmosphere exceeds a certain level, in addition to being directly harmful to human health, it can also produce photochemical smog under certain conditions when exposed to sunlight, causing harm to the environment and humans. It is necessary to use a biological purification treatment tower to clean up the water-based paint waste gas. However, when treating waste gas composed of ethanol, ketones, esters and aromatic compounds, the removal efficiency is low, and the effect of microorganisms on waste gas degradation will also be reduced after long-term use, resulting in the ineffective cleaning of water-based paint waste gas. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a biological purification treatment tower for water-based paint waste gas used for container spraying, so as to solve the problems raised in the above background technology that when treating waste gas composed of ethanol, ketone, esters and aromatic compounds, the removal efficiency is low, and the effect of microorganisms on waste gas degradation will also be reduced after long-term use, resulting in the problem of poor cleaning effect of water-based paint waste gas.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model provides the following technical solution: a biological purification treatment tower for waste gas from water-based paint spraying in containers, comprising:

[0008] A biological tower, wherein an atomization tower is arranged on the left side of the biological tower, and an air transmission pipe is installed between the biological tower and the atomization tower;

[0009] An air inlet is arranged on the left side of the atomization tower, and an exhaust port is opened on the upper surface of the biological tower;

[0010] A biological filler layer is arranged at the lower part of the inner cavity of the biological tower, a honeycomb activated carbon is installed in the middle part of the inner cavity of the biological tower, a first demisting layer is installed in the upper part of the inner cavity of the biological tower, a filler demister is installed in the upper part of the inner cavity of the biological tower, and a humidifying layer is installed in the lower part of the inner cavity of the atomization tower;

[0011] The biological water tank is arranged on the surface of the biological tower. Water pipes are provided on both sides of the surface of the biological water tank. The water pipes respectively penetrate the surface of the biological tower. Water spray pipes are installed at the water outlet ends of the water pipes. The water spray pipes are respectively located above the biological filler layer and the honeycomb activated carbon.

[0012] Preferably, a baffle demister is installed at the upper part of the inner cavity of the biological tower, and a second demister layer is installed at the upper part of the inner cavity of the atomization tower. The baffle demister and the second demister layer are used to clean water in the exhaust gas.

[0013] Preferably, first water pumps are installed at corresponding positions of the biological water tank and the water pipe, and the first water pumps are connected to the surface of the water pipe. The water in the biological water tank can be pumped into the water pipe through the first water pump.

[0014] Preferably, a humidifying water tank is installed on the surface of the atomizing tower, and a second water pump is installed on the surface of the humidifying water tank. The second water pump is installed with a drainage pipe, and the water in the humidifying water tank can be injected into the humidifying layer through the drainage pipe by the second water pump.

[0015] Preferably, cleaning doors are installed on the surfaces of the biological tower and the atomization tower, and the cleaning doors are connected to the surfaces of the biological tower and the atomization tower through threaded rods. The impurities remaining in the biological tower and the atomization tower can be cleaned by opening the cleaning doors.

[0016] Preferably, the inner cavity of the biological filler layer is filled with biological bacteria, including Bacillus, nitrifying bacteria, denitrifying bacteria and Pseudomonas debris, so that the biological filler layer and honeycomb activated carbon can more effectively clean the water-based paint exhaust gas.

[0017] Beneficial Effects

[0018] Compared with the prior art, the utility model provides a biological purification treatment tower for waste gas from water-based paint spraying in containers, which has the following beneficial effects:

[0019] 1. The biological purification treatment tower for water-based paint waste gas used for container spraying has an added water spray pipe that sprays the microorganisms in the biological water tank onto the surface of the honeycomb activated carbon, making the honeycomb activated carbon have a strong adsorption capacity. When the surface of the honeycomb activated carbon is attached with microorganisms, the dual effects of adsorption and biodegradation improve the removal performance of VOCs. When treating waste gas composed of ethanol, ketones, esters and aromatic compounds, the activated carbon loaded with microorganisms has a much higher removal efficiency for waste gas than the activated carbon without microorganism loading, thereby improving the cleaning efficiency of the honeycomb activated carbon for water-based paint waste gas;

[0020] 2. The container spraying water-based paint waste gas biological purification treatment tower has an added water spray pipe that sprays the microorganisms in the biological water tank onto the surface of the biological filler layer, thereby providing an additional carbon source for the microorganisms, accelerating the growth and metabolism of the microorganisms, and helping to speed up the biofilm formation of the biological tower. After the biofilm formation period is completed, the microorganisms only use organic waste gas as a carbon source, thereby improving the cleaning efficiency of organic waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the bio-tower of the utility model;

[0023] Figure 3 It is a cross-sectional structural schematic diagram of the atomizing tower of the utility model;

[0024] Figure 4 It is a schematic diagram of the plan structure of the biological tower of the utility model.

[0025] In the figure: 1. biological tower; 2. atomization tower; 3. air pipe; 4. air inlet; 5. exhaust port; 6. biological filler layer; 7. honeycomb activated carbon; 8. first demisting layer; 9. filler demister; 10. baffle demister; 11. humidifying layer; 12. second demisting layer; 13. biological water tank; 14. first water pump; 15. water pipe; 16. humidifying water tank; 17. second water pump; 18. drainage pipe; 19. cleaning door; 20. water spray pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides a technical solution, a biological purification treatment tower for waste gas from container spraying water-based paint, please refer to Figure 1 , including a biological tower 1, an atomization tower 2 is provided on the left side of the biological tower 1, and an air pipe 3 is installed between the biological tower 1 and the atomization tower 2;

[0028] An air inlet 4 is provided on the left side of the atomizing tower 2, and an exhaust port 5 is provided on the upper surface of the biological tower 1;

[0029] See also Figure 2 , the biological filler layer 6 is arranged at the lower part of the inner cavity of the biological tower 1, the honeycomb activated carbon 7 is installed in the middle part of the inner cavity of the biological tower 1, the first demisting layer 8 is installed in the upper part of the inner cavity of the biological tower 1, and the filler demister 9 is installed in the upper part of the inner cavity of the biological tower 1, please refer to Figure 3 A humidifying layer 11 is installed at the lower part of the inner cavity of the atomizing tower 2;

[0030] See also Figure 1 The biological water tank 13 is arranged on the surface of the biological tower 1. Water pipes 15 are arranged on both sides of the surface of the biological water tank 13. Figure 2 The water pipes 15 penetrate the surface of the biological tower 1 respectively, and the water outlet ends of the water pipes 15 are installed with water spray pipes 20, which are respectively located above the biological filler layer 6 and the honeycomb activated carbon 7;

[0031] The water spray pipe 20 sprays the microorganisms in the biological water tank 13 to the surface of the honeycomb activated carbon 7, so that the honeycomb activated carbon 7 has a strong adsorption capacity. After the microorganisms are attached to the surface of the honeycomb activated carbon 7, the dual effects of adsorption and biodegradation improve the removal performance of VOCs. When treating waste gas composed of ethanol, ketones, esters and aromatic compounds, the activated carbon loaded with microorganisms has a much higher removal efficiency for waste gas than the activated carbon without microorganism load, thereby improving the cleaning efficiency of the honeycomb activated carbon 7 for water-based paint waste gas. The water spray pipe 20 sprays the microorganisms in the biological water tank 13 to the surface of the biological filler layer 6, thereby providing an additional carbon source for the microorganisms, accelerating the growth and metabolism of the microorganisms, and helping to accelerate the biofilm formation of the biological tower 1. After the biofilm formation period is completed, the microorganisms only use organic waste gas as a carbon source, thereby improving the cleaning efficiency of organic waste gas.

[0032] A baffle demister 10 is installed at the upper part of the inner cavity of the biological tower 1, see Figure 3 A second demisting layer 12 is installed on the upper part of the inner cavity of the atomizing tower 2. The baffle demister 10 and the second demisting layer 12 are used to clean the water in the exhaust gas.

[0033] See also Figure 1A first water pump 14 is installed at the corresponding positions of the biological water tank 13 and the water pipe 15 . The first water pump 14 is connected to the surface of the water pipe 15 . The water in the biological water tank 13 can be pumped into the water pipe 15 through the first water pump 14 .

[0034] A humidifying water tank 16 is installed on the surface of the atomizing tower 2 , and a second water pump 17 is installed on the surface of the humidifying water tank 16 . The second water pump 17 is installed with a drainage pipe 18 , and the water in the humidifying water tank 16 can be injected into the humidifying layer 11 through the drainage pipe 18 by the second water pump 17 .

[0035] Cleaning doors 19 are installed on the surfaces of the biological tower 1 and the atomization tower 2. The cleaning doors 19 are connected to the surfaces of the biological tower 1 and the atomization tower 2 through threaded rods. The cleaning doors 19 can be opened to clean the impurities remaining in the biological tower 1 and the atomization tower 2.

[0036] See also Figure 4 The inner cavity of the biological filler layer 6 is filled with biological bacteria, including Bacillus, nitrifying bacteria, denitrifying bacteria and Pseudomonas debris, so that the biological filler layer 6 and the honeycomb activated carbon 7 can more effectively clean the water-based paint exhaust gas.

[0037] The water spray pipe 20 of the device sprays the microorganisms in the biological water tank 13 onto the surface of the honeycomb activated carbon 7, so that the honeycomb activated carbon 7 has a strong adsorption capacity. After the microorganisms are attached to the surface of the honeycomb activated carbon 7, the dual effects of adsorption and biodegradation improve the removal performance of VOCs. When treating waste gas composed of ethanol, ketones, esters and aromatic compounds, the activated carbon loaded with microorganisms has a much higher removal efficiency for waste gas than the activated carbon without microorganism load, thereby improving the cleaning efficiency of the honeycomb activated carbon 7 for water-based paint waste gas. The water spray pipe 20 sprays the microorganisms in the biological water tank 13 onto the surface of the biological filler layer 6, thereby providing an additional carbon source for the microorganisms, accelerating the growth and metabolism of the microorganisms, and helping to accelerate the biofilm formation of the biological tower 1. After the biofilm formation period is completed, the microorganisms only use organic waste gas as a carbon source, thereby improving the cleaning efficiency of organic waste gas.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biological purification tower for waste gas from container spraying with water-based paint, characterized in that: include: A biological tower (1), wherein an atomization tower (2) is arranged on the left side of the biological tower (1), and an air transmission pipe (3) is installed between the biological tower (1) and the atomization tower (2); An air inlet (4) is arranged on the left side of the atomization tower (2), and an exhaust port (5) is provided on the upper surface of the biological tower (1); A biological filler layer (6) is arranged at the lower part of the inner cavity of the biological tower (1), a honeycomb activated carbon (7) is installed in the middle part of the inner cavity of the biological tower (1), a first demisting layer (8) is installed in the upper part of the inner cavity of the biological tower (1), a filler demister (9) is installed in the upper part of the inner cavity of the biological tower (1), and a humidifying layer (11) is installed in the lower part of the inner cavity of the atomizing tower (2); A biological water tank (13) is arranged on the surface of the biological tower (1), and water pipes (15) are arranged on both sides of the surface of the biological water tank (13). The water pipes (15) respectively penetrate the surface of the biological tower (1), and water spray pipes (20) are installed at the water outlet ends of the water pipes (15). The water spray pipes (20) are respectively located above the biological filler layer (6) and the honeycomb activated carbon (7).

2. The biological purification treatment tower for waste gas from container spraying water-based paint according to claim 1 is characterized by: A baffle demister (10) is installed at the upper part of the inner cavity of the biological tower (1), and a second demister layer (12) is installed at the upper part of the inner cavity of the atomization tower (2).

3. The biological purification treatment tower for waste gas from container spraying water-based paint according to claim 1 is characterized by: The biological water tank (13) and the water pipe (15) are both installed with a first water pump (14) at corresponding positions, and the first water pump (14) is connected to the surface of the water pipe (15).

4. The biological purification treatment tower for waste gas from container spraying water-based paint according to claim 1 is characterized by: A humidifying water tank (16) is installed on the surface of the atomizing tower (2), a second water pump (17) is installed on the surface of the humidifying water tank (16), and the second water pump (17) is installed with a drainage pipe (18).

5. The biological purification treatment tower for waste gas from container spraying water-based paint according to claim 1 is characterized by: The surfaces of the biological tower (1) and the atomizing tower (2) are both installed with cleaning doors (19), and the cleaning doors (19) are connected to the surfaces of the biological tower (1) and the atomizing tower (2) through threaded rods.

Images